Description

mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the admin dashboard's Autodiscover logs render the EMailAddress value (logged as the "user" field) without HTML escaping. By submitting an unauthenticated Autodiscover request with a crafted EMailAddress containing HTML/JS, the payload is stored in Redis and executed when an admin views the Autodiscover logs. Version 2026-03b fixes the vulnerability.

INFO

Published Date :

2026-04-21T19:14:45.309Z

Last Modified :

2026-04-22T13:37:20.223Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-40872 vulnerability.

Vendors Products
Mailcow
  • Mailcow Dockerized
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-40872.

URL Resource
https://github.com/mailcow/mailcow-dockerized/security/advisories/GHSA-f9xf-vc72-rcgm cve-icon cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability